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研究了能量为E=160keV质子和电子单独及综合辐照作用对两种空间反射镜光学表面的影响。观察到在辐照剂量达到Φ=10×105/cm2后反射镜表面形咸了明显的结构缺陷,并导致某些谱段反射率的降低和成像质量的下降。辐照诱发缺陷的类型及分布特征除与粒子种类和反射镜结构有关外,还依赖于试样的接地方式。质子幅照主要引起反射镜表面膜层的起泡现象;电子辐照则使SiO2保护膜着色;综合辐照的影响复杂,尤其是在接近于空间使用条件的第二种接地方式下,起泡现象和静电效应成为镜面损伤的主要机制。
The effects of single and combined irradiation of proton and electron with energy E = 160 keV on the optical surface of two kinds of space mirrors were studied. It was observed that the surface of the mirror showed obvious structural defects after the irradiation dose reached Φ = 10 × 10 5 / cm 2, which led to the decrease of reflectivity and the decrease of imaging quality in some spectral sections. In addition to the type of particle and the structure of the mirror, the type and distribution of irradiation-induced defects also depend on the sample’s grounding method. Proton radiation mainly causes foaming on the surface of the mirror; electron irradiation causes the SiO2 protective film to be colored; the influence of the comprehensive irradiation is complicated, especially in the second grounding method close to the space usage conditions Phenomena and electrostatic effects become the main mechanism of the mirror damage.